Unseasonably warm, cold, or mild weather is warmer, colder, or milder than it usually is at the time of year.
...a spell of unseasonably warm weather.
It was unseasonably mild for late January.
Examples of 'unseasonably' in a sentence
unseasonably
The weather was unseasonably bad and the only island we saw was Mull.
Times, Sunday Times (2016)
The weather continues to be unseasonably mild.
Times, Sunday Times (2012)
We had unseasonably cold temperatures and an enormous blizzard.
Christianity Today (2000)
Not so unseasonably cold during the cool spells.
Times, Sunday Times (2009)
Struggling clothes shops cut the prices of jumpers and coats last month to entice shoppers despite unseasonably warm weather.
Times, Sunday Times (2011)
The unseasonably warm weather has also kept women from spending in stores packed with woollen jumpers and winter coats.
Times, Sunday Times (2006)
The sun was not shining on retailers last month as the unseasonably warm weather kept shoppers away from the high street.
Times, Sunday Times (2014)
The run of unseasonably high temperatures goes back as far as October.
Times, Sunday Times (2016)
Those unseasonably sunny early springs are exactly what there will be fewer of, not more.
Times, Sunday Times (2010)
Shame there is no snow as Canada is experiencing unseasonably high temperatures.
Times, Sunday Times (2010)
Buyers are beginning to notice, with viewings being booked unseasonably early this year.
Times, Sunday Times (2015)
September was upon us, but the weather was unseasonably warm.
Ben Nimmo IN FORKBEARD'S WAKE: Coasting Round Scandinavia (2003)
Weather records show it was bitterly and unseasonably cold, rainy and windy that morning.
Times, Sunday Times (2006)
Across much of Europe temperatures have been unseasonably cold.
Times, Sunday Times (2013)
This year we only turned on our central heating towards the end of November as it was unseasonably warm.
Times, Sunday Times (2008)
Strong winds are expected to die down but will continue to blow from the north today, keeping temperatures unseasonably low.
Times, Sunday Times (2013)
These have been triggered in part by the unseasonably warm weather, which has left unwanted winter clothes piled high on the shelves.
Times, Sunday Times (2015)
There were also thought to be concerns that retailers may have had a weak October as as a result of unseasonably warm weather.
Times, Sunday Times (2007)
Punters expected sales of DIY and garden products to have been buoyed by the hot summer and unseasonably mild autumn.
Times, Sunday Times (2013)
Thanksgiving was unseasonably warm in New England last year.
Times, Sunday Times (2016)
It fears unseasonably warm weather has lulled'at risk' groups into a false sense of well being.
The Sun (2015)
In the past year, it has blamed a harsh winter and then an unseasonably warm Easter for slack trade.
Times, Sunday Times (2012)
WE might be enjoying some unseasonably warm temperatures but it's still a great time to treat yourself to a hot new coat.
The Sun (2014)
The payouts come at a sensitive time as unseasonably cold weather forces households, already struggling with record energy bills, to turn up their heating.